Phenyl-imidazolyl-fatty acid derivatives for treating mycotic infections

ABSTRACT

PHENYL-IMIDAZOLYL-FATTY ACIDS DERIVATIVES OF THE FORMULA:   1-(X-(CH2)M-C(-R5)((R4)N-PHENYL)-),2-R2,4-R3,5-R1-IMIDA   ZOLE   WHEREIN R1, R2, AND R3 ARE THE SAME OR DIFFERENT, AND ARE HYDROGEN OR LOWER AKYL; R4 IS HYDROGEN, ALKYL, LOWER ALKOXY, ALKYLMERCAPTO, OR AN ELECTRO NEGATIVE MOIETY; R5 IS BENZENE, BENZENE SUBSTTITUTED BY ALKYL, LOWER ALKOXY, ALKYLMERCAPTO OR AN ELECTRO NEGATIVE MOIETY, OR R5 IS AN ALIPHATIC MOIETY; X IS A CARBOXYL MOIETY OR A GROUPING OF AFUNCTIONAL CARBOXYLIC ACID DERIVATIVE; M IS 0, 1, 2, 3, 4, 5 OR 6; AND N IS 0, 1 OR 2, AND PHARMACEUTICALLY ACCEPTABLE NON-TOXIC SALTS THEREOF ARE PRODUCED BY REACTTING A HALOGEN DERIVATIVE OF THE FOLMULA:   ((R4)N-PHENYL)-C(-HAL)(-R5)-(CH2)M-X   WHEREIN R4, R5, X, M AND N ARE AS ABOVE DEFINED, AND HAL IS HALOGEN, WITH AN OPTIONALLY ALKYL SUBSTITUTED IMIDAZOLE IN THE PRESENCE OF ACID-BINDING BASE OR AN EXCESS OF IMIDAZOLE, PREFERABLY IN AN INERT POLAR SOLVENT AT A TEMPERATURE OF FROM ABOUT 20*C. TO ABOUT 180*C., OR REACTING THE ABOVE HALOGEN DERIVATIVE WITH AN ALKALI METAL OR SILVER SALT OF AN OPTIONALLY ALKYL SUBSTITUTED IMIDAZOLE IN AN INERT SOLVENT AT A TEMPERATURE OF FROM ABOUT 20*C. TO ABOUT 200*C., OR REACTING A HYDROXYL COMPOUND OF THE FORMULA:   ((R4)N-PHENYL)-C(-OH)(-R5)-(CH2)M-X   WHEREIN R4, R5, X, M AND N ARE AS ABOVE DEFINED, WITH AN OPTIONALLY ALKYL-SUBSTITUTED IMIDAZOLE. THESE PHEYL-IMIDAZOLYL-FATTY ACID DERIVATIVES EXHIBIT ANTIMYCOTIC ACTIVITY.

United States Patent Int. Cl. A61k 27/00 US. Cl. 424-273 40 Claims ABSTRACT OF THE DISCLOSURE Phenyl-imidazolyl-fatty acid derivatives of the formula:

R R and R are the same or different, and are hydrogen or lower alkyl;

R is hydrogen, alkyl, lower alkoxy, alkylmercapto, or an electro negative moiety;

R is benzene, benzene substituted by alkyl, lower alkoxy, alkylmercapto or an electro negative moiety, or R is an aliphatic moiety;

X is a carboxyl moiety or a grouping of a functional carboxylic acid derivative;

m is 0,1, 2, 3, 4, 5 or 6; and

n is 0, 1 or 2,

and pharmaceutically acceptable non-toxic salts thereof are produced by reacting a halogen derivative of the formula:

wherein R R X, m and n are as above defined, and Hal is halogen,

with an optionally alkyl substituted imidazole in the presence of acid-binding base or an excess of imidazole, preferably in an inert polar solvent at a temperature of from about 20 C. to about 180 C., or reacting the above halogen derivative with an alkali metal or silver salt of an optionally alkyl substituted imidazole in an inert solvent at a temperature of from about 20 C. to about 200 C., or reacting a hydroxy compound of the formula:

(B on rier):

wherein R R X, m and n are as above defined,

with an optionally alkyl-substituted imidazole.

These phenyl-imidazolyl-fatty acid derivatives exhibit antimycotic activity.

This is a division of application Ser. No. 38,531, filed May 18, 1970, now US. Pat. No. 3,732,242.

The present invention is concerned with phenyl-imidazolyl-fatty acid derivatives, salts thereof, and processes for their production. More particularly, the compounds 3,826,836 Patented July 30, 1974 ice of the present invention are phenyl-imidazolylfatty acid derivatives of the formula:

Il l LE2 and pharmaceutically acceptable non-toxic salts thereof. These compounds are particularly useful for their antimycotic activity.

When any of the moieties R R or R are alkyl, it is preferred that they contain 1 to 4 carbon atoms.

When R is an alkyl moiety, it is preferred that it contain 1 to 4 carbon atoms, and methyl is particularly preferred. It is also preferred that the lower alkoxy moieties and the lower alkylmercapto moieties contain 1 to 4 car bon atoms in the alkyl portion of the moieties. The. term alkyl and lower alkyl as used herein is intended to embrace the straight as well as the branched chain alkyl moieties and includes, in addition to the alkyl moieties, the alkenyl and the alkynyl moieties as well.

Preferred electro negative substituents for R are halogen, fluorine, chlorine, bromine or iodine, chlorine being particularly preferred, N0 trifluoromethyl and cyano, as well as SO-alkyl and SO -alkyl in which the alkyl moieties contain from 1 to 6 carbon atoms, and preferably from 1 to 4 carbon atoms. As above indicated, these alkyl moieties may be straight or branched-chain and include, in addition to the alkyl groups, the alkenyl and alkynyl groups as well.

When R is an aliphatic moiety, this can be straight or branched chain, saturated or unsaturated alkyl of 1 to 8 carbon atoms and preferably of 1 to 4 carbon atoms. The aliphatic moiety may also be a saturated or unsaturated cycloaliphatic moiety of 3 to 6 carbon atoms and preferably of 5 to 6 carbon atoms in the ring system.

Examples of functional carboxylic acid derivatives for X include esters, carboxamide and nitrile groups.

If X is an ester moiety, its alcohol portion is a substituted, straight or branched chain, saturated or unsaturated aliphatic, cycloaliphatic or heteroaliphatic moiety. If this alcohol portion contains an alkyl group, this alkyl group is straight or branched chain of l to 18 carbon atoms and preferably of 1 to 12 carbon atoms, or such alkyl group substituted by an aromatic moiety.

If X is a carboxamide moiety, it is a free carboxamide moiety, a monoalkyl-carboxamide moiety or a dialkyl-carboxamide moiety wherein the alkyl portions are lower alkyl moieties, or lower alkyl moieties which may be linked to form a 5-, 6- or 7-membered ring system, or a 6-membered ring system having an oxygen, sulphur or nitrogen atom, or a 6-membered ring having an oxygen, sulphur or nitrogen atom which has attached thereto a lower alkyl moiety of 1 to 4 carbon atoms which is preferably in the p-position.

The salts of the present invention are physiologically compatible salts since the compounds of the present in- (D wherein vention are intended for administration to humans and ani- '4 mals. Thus, the salts may be formed with any of the known physiologically compatible acids, such as the hydrohalic acids, phosphoric acids, monoand bifunctional carboxylic acids, hydroxycarboxylic acids, for example, acetic acid, maleic acid, succinic acid, fumaric acid, tartaric acid, citric acid, salicyclic acid, sorbic acid, lactic acid and l,S-naphthalene-disulphonic acid.

The phenyl-imidazolyl-fatty acid derivatives of the present invention are produced by:

(a) Reacting a halogen derivative of the formula:

wherein R R X, m, and n are as above defined, and Hal is halogen, preferably chlorine, with an imidazole or an alkyl-substituted imidazole in the presence of an acidbinding base or an excess of imidazole, expediently in an inert polar solvent, such as acetonitrile, toluene, xylene, chlorobenzene, cyclohexane, acetone, diethyl ketone, dimethyl formamide or dimethyl sulphoxide, at a temperature of from about 20 C. to about 180 C., and especially of from about 50 C. to about 100 C.;

(b) Reacting a halogen derivative of the formula:

wherein R R X, m and n are as above defined, and Hal is halogen, preferably chlorine, with an alkali metal or silver salt of imidazole or of an alkyl-substituted imidazole in an inert solvent, such as benzene, toluene, xylene or cyclohexane at a temperature of from about 20 C. to about 200 C., and preferably from about 50 C. to 120 C.; or

(c) Reacting a hydroxy compound of the formula:

wherein R R X, m: and n are as above defined, with imidazole or an alkyl-substituted imidazole, with the elimination of water.

These reactions can be carried out according to procedures which are per se known, for example they may be carried out in the melt or with the aid of the azeotropic elimination of waterin the presence of higher-boiling solvents, such as xylene, chlorobenzene, etc., at the boiling point of the solvent used. In addition, it may be expedient at times to facilitate the elimination of water by the addition of a suitable dehydrating agent, such as alkaline earth metal oxide, for example MgO, BaO, CaO, or A1 The pharmaceutically acceptable non-toxic salts of the phenyl-imidazolyl-fatty acid derivatives are, of course, obtained by reacting the free base with the corresponding acid.

According to the present invention, a preferred group of compounds is represented by the formula:

R and R are both hydrogen;

R is hydrogen or methyl;

R is hydrogen, methyl, methoxy, nitro, fluorine, chlorine,

or bromine;

R is phenyl, phenyl-substituted in the p-position by fluorine, chlorine, bromine, methyl, methoxy or nitro,

or R is a straight or branched chain alkyl moiety of 1 to 5 carbon atoms; X is a carboxyl group, a moiety of the formula:

wherein R is straight or branched chain alkyl of 1 to 10 carbon atoms or benzyl, a moiety of the formula:

wherein R and R are the same or different, and are hydrogen or methyl, or R and R together with the amide nitrogen form a morpholino or piperidino ring, or X is a cyano moiety;

in is 0,1, 2, 3, 4, 5 or 6; and

n is 1.

Table I below lists representative phenyl-imidazolylfatty acid derivatives of the present invention.

TABLE I (1) Diphenyl-lmidazolyl-acetic acid methyl ester. (2) Diphenyl-imidazolyl-acetic acid. (3) Diphenyl-imidazolyl-acetie acid ethyl ester. (4) Diphenyl-imidazolyl-acetic acid n-propyl ester. (5) Diphenyl-imidazolyl-acetic acid isobutyl ester. (6).. Diphenyl-imidazolyl-acetic acid 'n-oetyl ester. (7) Diphenyl-imidazolyl-acetic acid n-decyl ester. (8) Diphenyl-imidazolyl-acetic acid benzyl ester. (9). Diphenyl-imidazolyl-acctic acid nitn'le. (10) Phenyl-4-methylph enyl-imidazolyl-acetic acid methyl ester. (11) Phenyl-Z-methylphenyl-irnidazolyl -acetic acid methyl ester. (12) B-Imidazolylpfi-diphenyl propionic acid ethyl ester. (13) Hydrochloride of diphenyl-imidazolylacetic acid methyl ester. (14) Phenyl-4-chlorophenyl-imidazolyl-acetic acid ethyl ester. (15) Phenyl-4-chlcrophenyl-imidazolyl-acetie acid methyl ester. (16) Phenyl-2-chlorophenyl-imidazolyl-acetlc acid methyl ester. (17) Phenyl-isopropyl-imidazolyl-acetic acid ethyl ester. (18)- Diphenyl-imidazolyl-acetic acid amide. (19) Diphenyl-imidazolyl-acetie acid methylamide. (20)- Dlphenyl-imidazolyl-acetic acid dimethylamide. (21) Diphenyl-imidazolyl-acetic acid morpholide. (22). Dlphenyl-imidazolyl-acetic acid peperidide.

(23)--.. Bis-(4-chloropl1enyl)-imidazolyl-acctic acid methyl ester.

(24). Bis-(4-tolyl)-imidazolyl-acetic acid methyl ester.

(25) Bis-(4-bromophenyl)-imidazolyl-acetic acid methyl ester.

(26)- Bis-(4-fiuorophenyl)imidazolyl-acetic acid methyl ester and the hydrochloride salt thereof.

(27) Bis-(4-methoxyphenyl)imidazoiyl-acetie acid methyl ester.

(28 Bisl-lg l-niitrophenyl)-lmidazolyl-acetlc acid ethyl ester hydroc on e.

(29) Phenyl-isopropyl-imidazolyl-propionlc acid ethyl ester.

(3 Phenyl-isopentyl-imldazolyl-propionlc acid ethyl ester.

(31)- PhenyLethyl-imidazolyl-isobutyric acid methyl ester.

(3 Diphenyl-itmeth yl-imidazolyl-acetic acid methyl ester.

(33 Phenyl-tert.-butyl-imidazolyl-acctie acid methyl ester.

(34 Diphenyl-hnidazolyl-acetic acid methyl ester-tartrate.

(3 Diphenyl-imidazolyl-acetic acid methyl ester-succinate.

(3 Diphenyl-imidazolyl-acetic acid methyl ester sulphate.

(37) Drphenyl-imldazolyl-acetic acid methyl ester-methane-sulphonate. (38)- Diphenyl-imidazolyl-acetic acid methyl ester-naphthalene- 1,5-disulphonate.

Particularly preferred compounds according to the present invention are diphenyl-imid'azolyl-acetic acid methyl ester and the hydrochloride salt thereof.

The starting materials required for the preparation of the compounds of the present invention are per se known or are obtainable according to processes which themselves are known per se.

The following non-limitative examples more particularly point out and illustrate the present invention.

EXAMPLE 1 U ,1 ?C O O CH;

13 g. (0.05 mole) diphenyl-chloroacetic acid methyl ester (b.p. C./0.1 mm. Hg, prepared from diphenyl- EXAMPLE 2 The corresponding carboxylic acid i.e. diphenyl-imidazolyl-acetic acid is obtained by hydrolysis of the diphenylimidazolyleacetic acid methyl ester obtained in Example 1,'- withan alcoholic potassium hydroxide solution.

EXAMPLES 3-8 --The compounds of these Examples were obtained according to the procedure set forth in Example 1, by reacting imidazole with the following reactants:

'"From 13.7 g. diphenyl-chloroacetic acid ethyl ester (0.05 mole) (Ber. 22, 1537): the diphenyl-imidazolylacetic acid ethyl ester of m.p. 104 C.

From 14.4 g. diphenyl-chloroacetic acid propyl ester (b.p. 155 C./0.3 mm. Hg): the diphenyl-imidazolylacetic-acid n-propyl ester of m.p. 71 C.

:From 15.1'g. diphenyl-chloroacetic acid isobutyl ester (b.p." 150 C./ 0.2 mm. Hg): the diphenyl-imidazolyl-acetic acid isobutyl ester as oil.

From 16.0 g. diphenyl-chloroacetic acid octyl ester (b.p. 195 C./0.3 mm. Hg): the diphenyl-imidazolylacetic acid n-octyl ester as oil.

From 19.3 g. diphenyl-chloroacetic acid decyl ester: the diphenyl-imidazolyl-acetic acid n-decyl ester of m.p. 48 C.

a From 16.8 g. diphenyl-chloroacetic acid benzyl ester: the diphenyl-imidazolyl-acetic acid benzyl ester as oil.

EXAMPLE 9 N t n 1 13.7 g. phenyl-1z-tolyl-chloroacetic acid methyl ester (prepared from p-tolyl-magnesium bromide and benzoylformic' acid'meth'yl ester and treatment with PCl (b.p. 150 C./ 013 mm. Hg)" are heated with 10 g. imidazole in 100 ml. acetonitrile at boilingtemperature for 16 hours. The acetonitrile is distilled off in a vacuum. The residue is treated with 50 ml. of water and then extracted with .methylenechloride. The methylene chloride solution is distilled 0ft in a'vacuum and 'the residue recrystallized from a little ethyl acetate. The phenyl-p-tolyl-imidazolylacetic acid methyl ester i.e. phenyl-4-methylphenyl-imidazolyl-acetic acid methyl ester of m.p. 146 C. is thus obtained.

EXAMPLE 11 The phenyl-o-tolyl-imidazolyl-acetic acid methyl ester i.e. phenyl-Z-methylphenyl-imidazolyl-acetic acid methyl ester (m.p. 148 C.) is obtained in an analogous way from phenyl-o-tolyl-chloroacetic acid methyl ester (b.p. 160 C./0.4 mm. Hg).

EXAMPLE 12 14.4 g. (0.05 mole) ,B-chloro-B,B-diphenyl-propionic acid ethyl ester (prepared from fl-hydroxy-5,fl-diphenylpropionic acid ethyl ester, Ber. 40, 4538, by treatment with phosphorus pentachloride) are heated in 100 ml. acetonitrile with 10 g. imidazole at boiling temperature for 16 hours. The solvent is distilled off in a vacuum, the residue treated with 50 ml. of water and extracted with methylene chloride. After drying, the solvent is distilled off in a vacuum. The )8-imidazolyl-5,;3-diphenylpropionic acid ethyl ester is thus obtained in the form of crystals of m.p. C.

EXAMPLE 13 5 g. of the diphenyl-irnidazolyl-acetic acid methyl ester of Example 1 are dissolved in carbon tetrachloride and hydrogen chloride is introduced with cooling. The carbon tetrachloride is decanted off from the precipitated oily salt and the salt is reprecipitated from acetone/ether. The hydrochloride of the above base i.e. diphenyl-imidazolylacetic acid methyl ester hydrochloride is thus obtained; m.p. 131 C. (decomp.).

EXAMPLE 14 15.45 g. (0.05 mole) phenyl-p-chlorophenyl-chloroacetic acid ethyl ester (prepared from p-chlorophenylmagnesium bromide and benzoyl-formic acid ethyl ester and subsequent treatment with thionyl chloride: b.p. 160 C./0.2mm. Hg) are boiled with 10 g. imidazole in 100 ml. acetonitrile for 16 hours. After distilling off the solvent, 50 ml. of water are added, and the mixture is extracted with methylene chloride. After drying, the solvent is distilled oif in a vacuum and the phenyl-p-chlorophenyl-imidazolyl-acetate acid ethyl ester i.e. phenyl-4- chlorophenyl-imidazolyl-acetic acid ethyl ester is obtained in the form of an oil which solidifies after a fairly long time.

EXAMPLE 15 The phenyl p chlorophenyl -imidazoly1 acetic acid methyl ester i.e. phenyl-4-chlorophenyl-imidazolyl-acetic acid methyl ester of melting point 135 C. (ethyl acetate) is obtained in an analogous way by reacting phenylchlorophenyl-chloroacetic acid methyl ester and imidazole.

EXAMPLE 16 The phenyl 0 chlorophenyl imidazolyl acetic acid methyl ester i.e. phenyl-2-chlorophenyl-imidazolyl-acetic acid methyl ester of melting point 138C. (ethyl acetate) is obtained by the method described in Example 14 by reacting phenyl-o-chlorophenyl-chloroacetic acid methyl ester and imidazole.

EXAMPLE 17 12 g. (0.05 mole) phenyl-isopropyl-chloroacetic acid ethyl ester (b.p. C./0.3 mm. Hg) are heated with 10 g. imidazole and ml. acetonitrile at boiling temperature for 18 hours. After distilling ofl? the solvent in a vacuum, 50 ml. of water are added and the mixture is extracted by shaking with methylene chloride. The methylene chloride is dried and distilled off in a vacuum. The phenyl-isopropyl-imidazolyl-acetic acid ethyl ester is thus obtained in the form of an oil.

7 EXAMPLE 18 12.27 g. (0.05 mole) diphenyl-chlo'roacetic acid amide (Ber. 41, 3593) are heated with 11.8 g. imidazole in 100 ml. acetonitrile at boiling temperature for 18 hours. After cooling, the crystals are suspended in water and rinsed. After recrystallization from methanol, diphenyl-imidazolyl-acetic acid amide of m.p. 218 C. is obtained.

EXAMPLE 19 13 g. (0.05 mole) diphenyl-chloroacetic acid methylamide (prepared from diphenyl-chloroacetic acid chloride and methylamine in analogy With Ber. 41, 3593; m.p. 108 (C.) are heated with 11.5 g. imidazole in 100 ml. acetonitrile at boiling temperature for 18 hours. After cooling, the crystals are filtered off with suction, digested with water and rinsed. After recrystallization from methanol, diphenyl-imidazolylacetic acid methylamide of b.p. 237 C. is obtained.

EXAMPLE 20 18.1 g. diphenyl-chloroacetic acid dimethylamide (m.p. 128 C., prepared by analogy with Example 19) are heated with 15.6 g. imidazole in 120 ml. acetonitrile at boiling temperature for 18 hours. The solvent is distilled off in a vacuum. After the addition of 70 ml. of water, the mixture is extracted with methylene chloride. After drying, the solvent is distilled oil in a vacuum and the solid residue is recrystallized from methanol. The diphen yl-imidazolyl-acetic acid dimethyl amide of m.p. 202 C. is thus obtained in the form of colourless crystals.

EXAMPLE 21 The diphenyl-imidazolyl-acetic acid morpholide is obtained from 15.5 g. diphenyl-chloroacetic acid morpholide (m.p. 113 C.) and 11 g. imidazole in 100 ml. acetonitrile on analogy with Example 20.

The hydrochloride of diphenyl-imidazolyl-acetic acid morpholide of m.p. 118 C. is obtained by adding ethereal hydrochloric acid to a solution of diphenyl-imidazolylacetic acid morpholide in ethyl acetate.

EXAMPLE 22 The diphenyl-imidazolyl-acetic acid piperidide of m.p. 160 C. is obtained from 15.4 g. diphenyl-chlor-acetic acid piperidide (m.p. 82 C.) and g. imidazole in 100 ml. acetonitrile in analogy with Example 20.

EXAMPLE 23 162.6 g. (0.434 mole) of 4,4-dichlorophenylbromoacetic acid methyl ester (prepared from 4,4-dichlorobenzilic acid methyl ester) and phosphorus pentabromide (b.p. 190/0.5 mm. Hg.) are heated to the boil for 14 hours, with stirring, with 90 g. (1.32 moles) of imidazole in 1 litre of acetonitrile. The acetonitrile is distilled off in a vacuum. For the removal of imidazole, the residue is twice shaken with, in each case, 1.3 litres of water, then taken up in 950 ml. of methylene chloride and again extracted with 1.8 litres of water. After drying with sodium sulphate, the methylene chloride is distilled in a vacuum. The residue is boiled out four times with, in each case, 250 ml. of ether; the ethereal solution, after clarification with charcoal, is precipitated with ethereal hydrochloric acid. The precipitate is digested with absolute ether and taken up in methylene chloride; after filtration, ethyl acetate is added. When the methylene chloride is evaporated on a water-bath, the hydrochloride of bis-(4-chlorophenyl)-imidazolyl-acetic acid methyl ester of the melting point 150 C. (with decomposition) crystallizes out in colourless crystals.

When the hydrochloride is shaken with methylene chloride and solution of sodium carbonate, a solution of the base is obtained. After this has been dried, distillation in EXAMPLE 24 Analogously with Example 23, there is obtained from 13.3 g. 4,4-ditolyl-ot-bromoacetic acid methyl ester and 10 g. imidazole in 100 ml. acetonitrile the hydrochloride of bis-(4-tolyl)-imidazolyl-acetic acid methyl ester of the melting point 140 C. (with decomposition) in colourless crystals.

EXAMPLE 25 19.4 g. 4,4-dibromodiphenylbromoacetic acid methyl ester (prepared from 4,4 dibromodiphenylacetic acid methyl ester and bromosuccinimide) are heated to the boil for 15 hours with 8.4 g. imidazole in 8.5 ml. acetonitrile. The acetonitrile is distilled off in a vacuum. The residue is shaken twice with, in each instance, 110 ml. of water and decanted. The residue is then taken up in about 100 ml. of methylene chloride and again extracted with ml. of water. After drying of the methylene chloride, the latter is distilled off in a vacuum. The residue is boiled out four times with, in each case, ml. of absolute ether. The ether is clarified with charcoal and precipitation is effected with ethereal hydrochloric acid. The hydrochloride precipitating in lumps is digested twice with absolute ether, then taken up in methylene chloride. After filtration, ethyl acetate is added, and the methylene chloride is evaporated on a water-bath. After cooling, the hydrochloride of bis(4-bromophenyl)-imidazolyl-acetic acid methyl ester of the melting point 140 C. crystallizes out in colourless crystals.

The hydrochloride is shaken with methylene chloride and solution of sodium carbonate. The solution of the base in methylene chloride is dried and distilled off in a vacuum. The residue is recrystallized from a little absolute ether. There are so obtained the colourless crystals of bis-(4-bromophenyl)imidazolyl-acetic acid methyl ester of the melting point 135 C.

EXAMPLE 26 In the same manner as in Example 23, there is obtained from 40.1 g. 4,4'-difiuorodiphenylbromoacetic acid methyl ester (b.p. 143/0.4 mm. Hg, prepared from 4,4- difluorodiphenylacetic acid methyl ester and N-bromosuccinimide) and 23.6 g. imidazole in 236 ml. acetonitrile the hydrochloride of bis-(4-fl1iorophenyl)-imidazolyl-acetic acid methyl ester of the melting point 147 C. From this there is obtained, with solution of sodium carbonate in methylene chloride, the free base of the melting point 128 C.

EXAMPLE 27 In the same manner as in Example 23, there is obtained from 4,4-dimethoxybenzilic acid methyl ester (m.p. C.) with phosphorus pentachloride via 4,4-dimethoxyphenyl-a-chloroacetic acid methyl ester with imidazole in acetonitrile the bis (4 methoxyphenyl)-imidazolyl-acetic acid methyl ester of the melting point 131 C.

EXAMPLE 28 In the same manner as in Example 23, with analogous working up, there is obtained from 10.25 g. 4,4-dinitrodiphenylbromoacetic acid ethyl ester (m.p. C., prepared from 4,4'-dinitrodiphenylacetic acid ethyl ester and N-bromosuccinimide) and 5 g. imidazole in 70 ml. acetonitrile the hydrochloride of bis-(4-nitrophenyl)-imidazolyl-acetic acid ethyl ester -of the melting point 130 C. (with decomposition) in colourless crystals.

EXAMPLE 29 Analogously with Example 12, by reacting p-chloro-B- phenyl-fi-isopropyl-propionic acid ethyl ester and imid- 9 azole, fl-phenyl-fi-isopropyl-fl-imidazolyl-propionic acid ethyl ester is obtained as oil, and from this there is obtained, with ethereal hydrochloric acid, the hydrochloride of the melting point 194 C.

EXAMPLE 30 Analogously with Example 12, by reacting B-chloro-B- EXAMPLE 34 acetic acid methyl ester are obtained:

Melting phenyl-fi-isopentyl-propionic acid ethyl ester and imidpoint s azole, ,8 phenyl 8-isopentyl-B-imidazolyl-propionic acid Acid Salt (deco'mpj ethyl ester is obtained as 011. 10 Armani" E v 135 l'lf'fl 1 EXAMPLE 31 811M312. did??? Y i% Analogouslywith Example 12, by reacting p-chloro-B- Lfigfgf $23 phenyl-fl-ethyl-lsobutync acid ethyl ester and imidazole, dlsfllphomcdlsulphonatefi-phenyl-p-ethyl-B-imidazolyl isobutyric acid ethyl ester is obtained as oil.

EXAMPLE 32 13 g. diphenyl-a-chloroacetic acid methyl ester (0.05 mole) are heated to the boil for hours with 12.1 g.

Z-methyI-imidazole in 100 m1. acetonitrile. The acetoni- 20 distilled otf in a vacuum. The residue is recrystallized from a little ethyl acetate. There is so obtained the diphenyl 2 methyl-imidazolyl-acetic acid methyl ester of the metling point 136 C.

EXAMPLE 33 12.7 g. (0.05 mole) phenyl-tert.-butyl-chloroacetic acid methyl ester (b.p. 96 C./0.3 mm. Hg) are heated to the The antimycotic activity of the phenyl-imidazolyl-fatty acid derivatives and the pharmaceutically acceptable nontoxic salts thereof is shown by the in-vitro and in-vivo data set forth below. Tables 11 and III illustrate the in-vitro activity of these compounds which is primarily fungistatic. Fnngicidal effects with a reduction of the inoculum by 95% in 24 hours can be achieved with a twoto threefold minimum inhibitory concentration.

The determination of the minimum inhibition concentrations stated in Tables II and III in 'y/ml. of nutrient solution was eflected.

(a) in the case of dermatophytes and mould fungi, in

Sabourauds milieu depreuve, (b) in the case of yeast, in yeast/meat broth bouillon.

The incubation temperature was 28 C, and the duration of incubation was 48 to 96 hours.

TABLE II Minimum inhibition concentration in lml. test medium in the case of- Trichophyton ment. Candida albz'ca'ms Aspergillus niger Compound from Without With Without With Pen. Without With Microap. Example serum serum serum serum COIWLLTLB serum serum felineum TABLE III Minimum inhibition concentration in 'y/ml. nutrient medium Trichophyton 'me'nta- Candida albicans Asperqillus mger prophytes serum serum serum Compound from Pemcillmm Mrcrosponm Hystoplas'ma Cocczdrodea Example With Without With Without commie With Without felmeum capsulamm im'mztia boil for 17 hours with 10 g. imidazole and 100 ml. acetonitrile. After the solvent has been distilled oif in a vacuum,

The following compounds representative of those of, the present invention were tested for in-vivo activity accordtreatment with ml. of water is efiected followed by ex- 70 ing to the Procedures t forth below:

traction with methylene chloride. The methylene chloride is again extracted with 30 m1. of water, dried and distilled off in a vacuum. There is so obtained the phenyl-tert.- butyl-imidazolyl-acetic acid methyl ester as oil, which solidifies after a long time.

diphenyl-imidazolyl-acetic acid methyl ester (Exa'mple diphenyl-imidazolyl-acetic acid ethyl ester-(Example 3) diphenyl-imidazolyl-acetic acid n-propyl ester(Exampie 4) 1 v ,ph yl. 2

(1 1 diphenyl-imidazolyl-acetic acid iso-butyl ester--(Examle5.... 1 I p J methylphenyl-imidazolyl acetic acid methyl esteF-(Example 11) v diphenyl-imidazolyl-acetic, acid methyl ester hydrochloride-(Example 13) diphenyl-imidazolyl-acetic acid morpholide hydrochloride.-(Example 21) bis-(4-chlorophenyl)-imidazolyl-acetic acid methyl ester (Example 23) bis-(4-chlorophenyl)-imidazolyl-acetic acid methyl ester hydrochloride-(Example 23) bis-(4-bromophenyl)-imidazolyl-acetic acid methyl ester (base)-(Example 25) bis-(4-bromophenyl)-imidazolyl-acetic acid methyl ester hydrochloride-(Example 25 bis-(4-fluorophenyl-imidazolyl-acetic acid methyl ester hydrochloride-(Example 26) bis-(4-methoxyphenyl)-imidazolyl-acetic acid methyl ester (base)(Example 27) bis-(4-nitrophenyl)-imidazolyl-acetic acid ethyl ester hydrochloride--(Example 28) white mouse with the compounds of Examples 1, 3, 4, 5,

11,13, 21, 23, 25, 26, 27 and 28.

o 6 mice of the strain CF -SPF of 20-22 g. weight were infected intravenously with 2-5 1() Candida albicans cells per mouse. With this experimental arrangement, untreated animals died of the infection within 6 days. When 30-60 mg. of these compounds per kilogram body weight of the infected animals was administered orally once or twice daily, an average of 13 to 16 of the 20 animals receiving the administration survived on the 6th day after infection. In the case of treatment with the compound of Example 13, 19 to 20 of the animals of the group of 20 survived. The optimum dosage for the compounds of Examples 1, 3, 5, 13, 23 and 28 was shown to be 50 mg./kg.. twice daily. The optimum dosage for compounds of Examples 4, ll, 21, 25, 26 and 27 was shown to be 60 mg./ kg. twice daily.

For oral application, the preparations were suspended in 0,25%-strength glucose-agar and administered with the oesophageal sound. 7

(B) Parenteral treatment of experimental candidiasis and histoplasmosis of the mouse with the compound from 'Example 13. In the case of a parenteral administration of the compound from Example 13 in a dosage of 25 mg./kg. twice daily, 18 of 20 animals survived 6 days after the infection.

(C) Local treatment of experimental guinea-pig trlchophytosis with the compound from Example 13. Infection of the-animals was effected by Trichophyton mentagrophytes. From the 3rd day after infection, the infection point was treated once daily by application of 0.5 ml. of

a l%-strength solution of the active compound in polyethyleneglycol 400. This treatment was continued up to the 14th day after infection. Within the therapy period, the dermatosis healed up. In the case of untreated infected control animals, bleeding ulcerations of the infection point as well as loss of hair occured up to about 30 days after infection.

The phenyl-imidazolyl-fatty acid derivatives and the pharmaceutically acceptable non-toxic salts thereof are thus particularly useful in treating the following diseases:

(a) In human medicine:

(1) Dermatomycoses caused by fungi of the species Trichophytes, Microsporium, Epidermophytcs, Aspergillus,

Candida albicans and other yeasts,

(2) Organomycoses caused by yeasts, mould fungi and Dermatophytes,

(b) In veterinary medicine: Dermatomycoses and organomycoses by yeasts, mould fungi and Dermatophytes.

The compounds of the present invention may be administered orally, parenterally or topically.

While in general it has proved advantageous to administer from about 20 mg./kg. to about 50 mg./kg. per day in order to achieve satisfactory results, it is to be appreciated that it may be necessary to deviate from these ranges and that a variety of factors such as the body weight of the test animal or patient, the method of administration, the animal species, the past medical history of the patient, the individual reaction to the medication, the type of formulation, and the moment in time or the time interval at which it is to be administered are all among the factors which are to be taken into consideraion. It may in certain cases be sufficient to use less than the above indicated minimum amount, whereas in other cases it may be necessary to administer more than the above indicated amount. If larger amounts are to be administered, it is preferred that these be administered in several dosages during the course of the day.

Also according to the present invention are pharmaceutical compositions which comprise the phenyl-imidazolylfatty acid derivatives or the pharmaceutically acceptable non-toxic salts thereof in combination with pharmaceutically acceptable non-toxic carriers and diluents. Suitable forms of application, in combination with various inert carriers, are the following: tablets, capsules, powders, sprays, aqueous suspensions, injectable solutions, elixirs, syrups and the like. Such carriers comprise solid diluents or fillers, a sterile aqueous medium as well as non-toxic organic solvents and the like. Tablets and the like intended for oral application may, of course, be provided with sweetening additives and similar substances. In the aforesaid case the therapeutically active compound should be present at a concentration of about 0.5 to percent by weight of the total mixture, i.e. in quantities which are sufiicient to achieve the range of dosage mentioned above.

The pharmaceutical compositions according to the present invention may include a protective envelope containing the active compound and if the compound is in combination with a diluent or carrier, the envelope may contain said diluent or carrier as well.

The term medicament in dosage unit form as used in the present specification means a medicament as defined above in the form of discrete portions each containing a unit dose, or a multiple or sub-multiple of a unit dose of the active compound or compounds. Such portions may, for example, be in monolithic coherent form, such as tablets, suppositories, pills or drages; in wrapped or concealed form, such as wrapped powders, cachets, sachets, or capsules; in ampoules, either free or as a sterile solution suitable for parenteral injection; or in any other form known to the art.

In the case of oral application, the tablets can obviously also contain additives, such as sodium citrate, calcium carbonate and dicalcium phosphate together with various other additives, such as starch, preferably potato starch, and the like, and binding agents, such as polyvinyl-pyrrolidone, gelatin and the like. Lubricants, such as magnesium stearate, sodium lauryl sulphate and talc may also be added for the production of tablets. In the case of aqueous suspensions and/or elixirs which are intended for oral application, the active substances may be used with various flavouring agents, colouring substances, emulsifiers and/or together with diluents, such as water, ethanol, propylene glycol, glycerol and similar compounds or combinations of this type.

In the case of parenteral application, solutions of the active substances in sesame or peanut oil, or in aqueous propylene glycol or N,N-dimethyl formamide can be used as can sterile aqueous solutions in the case of water-soluble compounds. Aqueous solutions of this kind should be buffered in usual manner if necessary; furthermore, the liquid diluent should previously be rendered isotonic by the addition of the necessary amount of salt or glucose. Such aqueous solutions are particularly suitable for intravenous, intramuscular, intraperitoneal and subcutaneous injections. Sterile aqueous media of this kind are prepared in known manner.

Local application is effected in the form of 0.5%, preferably 1%, solutions (for example in dimethyl formamide, glycerol, water; alcohol, such as ethanol and isopropanol and butter solutions), but also as emulsions, suspensions, powders and tablets.

When the compounds of the present invention are administered, they may of course be administered either in the form of a free base or in the form of a pharmaceutically acceptable nontoxic salt thereof. Thus, the free base and the salts may be contained in capsules, tablets, pastilles, drages and ampoules, and the like for oral administration which is a particularly facile mode of administration.

The phenyl-imidazolyl-fatty acid derivatives and the pharmaceutically acceptable non-toxic salts thereof, or the pharmaceutical compositions above described may be formulated in unit dosage form wherein each dosage unit is so formulated that it provides a single dose of the active compound, or it may contain a plurality of doses, or a fraction of a dose. Common dosages include two, three or four doses or a half, quarter or third of a dose.

While hitherto known antimycotics are elfective only against yeasts, such as amphotericin B, or only against zygomycetes, such as griseoful-vin, the compounds of the present invention even upon oral administration are effective against yeast as well as against zygomycetes. In particular, the compounds of the present invention exhibit substantially less toxicity than amphotericin B and their eifectiveness is substantially greater than that of griseofulvin.

In addition to their antimycotic activity, the compounds of the present invention also exhibit activity against pathogenic protozoa, such as trypanosomes, trichomonades, Entamoeba histolytica, causative organisms of malaria, as well as an activity against gram-positive cocci, such as staphylococci, and against gram-negative bacteria, such as E. coli. When the compounds of the present in: vention are administered to humans or animals for such activity, they are administered in the same general manner and amounts as known compounds exhibiting those activities.

What is claimed is:

1. A pharmaceutical composition for the treatment of mycotic infections comprising an antimycotically efiective amount of a compound selected from the group consisting of (a) a phenyl-imidazolyl-carboxylic acid derivative of the formula:

TI R4 LN) bcm mx t.

R is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylmercapto of 1 to 4 carbon atoms, chloro, fluoro, bromo or nitro;

R is alkyl of 1 to 8 carbon atoms, phenyl or phenyl substituted by alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylmercapto of 1 to 4 carbon atoms, chloro, fluoro, bromo or nitro;

X is cyano, carboxy, carbalkoxy in which alkoxy has from 1 to 12 carbon atoms, carbobenzyloxy, carbamyl, N- alkylcarbamyl in which alkyl has 1 to 4 carbon atoms, or N,N-di(alkyl)carbamyl in which each alkyl group has 1 to 4 carbon atoms; and

m has a value of 0 or 1; and

wherein (b) the pharmaceutically acceptable nontoxic salts there? of, in combination with a pharmaceutically acceptable nontoxic carrier.

2. A composition according to claim 1 wherein said compound is a salt.

3. A composition according to claim 2 wherein the salt is one formed from said phenyl-imidazolyl-carboxylic acid derivative and an acid selected from the group consisting of a hydrohalic acid, phosphoric acid, sulfuric acid, monoand dicarboxylic acids, hydroxycarboxylic acids and monoand disulfonic acids.

4. A composition according to claim 1 wherein in said phenyl-imidazolylcarboxylic acid derivative R is hydrogen, methyl, methoxy, nitro, fluoro, chloro or bromo; and R is phenyl, phenyl substituted in the p-position by fluoro, chloro, bromo, methyl, methoxy or nitro, or straight or branched alkyl of 1 to 5 carbon atoms.

5. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid methyl ester.

6. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid.

7. A composition according to claim 1 wherein said compound is diphenyl irnidaZolyl-acetic acid ethyl ester.

8. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid n-propyl ester.

9. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid isobutyl ester.

10. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid n-octyl ester.

11. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid n-decyl ester.

12. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid benzyl ester.

13. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid nitrile.

14. A composition according to claim 1 wherein said compound is phenyl 4 methylphenyl-imidazolyl-acetic acid methyl ester.

15. A composition according to claim 1 wherein said compound is phenyl 2 methylphenyl-imidazolyl-acetic acid methyl ester.

16. A composition according to claim 1 wherein said compound is ,B-imidazolyl-fi,fi-diphenyl propionic acid ethyl ester.

17. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid methyl ester hydrochloride.

18. A composition according to claim 1 wherein said compound is phenyl-4-chlorophenyl-imidazolyl-acetic acid ethyl ester.

19. A composition according to claim 1 wherein said compound is phenyl-4-chlorophenyl-imidazolyl-acetic acid methyl ester.

20. A composition according to claim 1 wherein said compound is phenyl-2-chlorophenyl-imidazolyl-acetic acid methyl ester.

21. A composition according to claim 1 wherein said compound is phenyl-isopropyl-imidazolyl-acetic acid ethyl ester.

22. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid amide.

23. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid methylamide.

24. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid dimethylamide.

25. A composition according to claim 1 wherein said compound is bis-(4-chlorophenyl)-imidazolyl-acetic acid methyl ester.

26. A composition according to claim 1 wherein said compound is bis-(4-tolyl)-imidazo1yl-acetic acid methyl ester.

27. A composition according to claim 1 wherein said compound is bis-(4-bromophenyl)-imidazolyl-acetic acid methyl ester.

28. A composition according to claim 1 wherein said compound is bis-(4-fluorophenyl)imidazolyl-acetic acid methyl ester.

29. A composition according to claim 1 wherein said compound is bis-(4 methoxy-phenyl)-imidazolyl-acetic acid methyl ester.

30. A composition according to claim 1 wherein said compound is bis-(4-nitro-phenyl)-imidazolyl-acetic acid ethyl ester hydrochloride.

31. A composition according to claim 1 wherein said compound is phenyl-isopropyl-imidazolyl-propionic acid ethyl ester.

32. A composition according to claim 1 wherein said compound is phenyl-isopentyl-imidazolyl-propionic acid ethyl ester.

33. A composition according to claim 1 wherein said compound is diphenyl-2-methyl-imidazolyl-acetic acid methyl ester.

34. A composition according to claim 1 wherein said compound is phenyl-tert.-butyl-imidazo1yl-acetic acid methyl ester.

35. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid methyl estertartrate.

36. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid methyl estersuccinate.

37. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid methyl ester sulphate.

38. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid methyl estermethane-sulphonate.

39. A composition according to claim 1 wherein said compound is diphenyl-imidazolyl-acetic acid methyl ester- 3 of a compound selected from the group consisting of a phenyl-imidazolyl-carboxylic acid derivative of the formula TI R4 LN) wherein R is hydrogen, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylmercapto of 1 to 4 carbon atoms, chloro, fiuoro, bromo or nitro;

R is alkyl of 1 to 8 carbon atoms, phenyl or phenyl substituted by alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, alkylmercapto of 1 to 4 carbon atoms, chloro, fiuoro, bromo or nitro;

X is cyano, carboxy, carbalkoxy in which alkoxy has from 1 to 12 carbon atoms, carbobenzyloxy, carbamyl, N-alkylcarbamyl in which alkyl has 1 to 4 carbon atoms, or N,N-di(alkyl)carbamyl in which each alkyl group has 1 to 4 carbon atoms; and

m has a value of O or 1; and

the pharmaceutically acceptable nontoxic salts thereof.

References Cited UNITED STATES PATENTS 2,411,662 11/1946 Martin et a1 260-558 A 3,190,917 6/1965 Johnson et al 260-558 A 3,592,805 7/1971 Szabo et al. 260 -309 OTHER REFERENCES Klinger, H.: Chemical Abstracts, vol. 6, pp. 2081-82 (1912).

JEROME D. GOLDBERG, Primary Examiner I UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 26,33 Dated u 30, 1974 Karl Heinz Buchel et a1 7 Inventofls) It is certified that error appears in the aboveide ntified patent and that said Letters Patent are hereby corrected as shown below:

In the heading of the patent, please insert:

-- Claims priority from German application P 'l925994r0,

filed in Germany on May 21, 1969.

Signed and sealed this 31st day of December 1974.

(SEAL) Attest:

McCOY M. GIBSON JR. C. MARSHALL DANN' Attesting Officer Commissioner of, Patents FORM 904050 (1M9) uscoMM-oc scan-pas u-s. "IIIIIT "l'nm OFFICE: 0-3% 

